python map latitude and longitude conversion correction of the instance code

The code for latitude and longitude conversion and deviation correction of python map is as follows:

# -*- coding: utf-8 -*-
import json
import urllib
import math
x_pi = 3.14159265358979324 * 3000.0 / 180.0
pi = 3.1415926535897932384626 #  PI. 
a = 6378245.0 #  Long half shaft 
ee = 0.00669342162296594323 #  Eccentricity squared 
class Geocoding:
  def __init__(self, api_key):
    self.api_key = api_key
  def geocode(self, address):
    """
     Use of gold geocoding The service resolves the address to get the location coordinates 
    :param address: The address that needs to be resolved 
    :return:
    """
    geocoding = {'s': 'rsv3',
           'key': self.api_key,
           'city': ' The national ',
           'address': address}
    geocoding = urllib.urlencode(geocoding)
    ret = urllib.urlopen("%s?%s" % ("http://restapi.amap.com/v3/geocode/geo", geocoding))
    if ret.getcode() == 200:
      res = ret.read()
      json_obj = json.loads(res)
      if json_obj['status'] == '1' and int(json_obj['count']) >= 1:
        geocodes = json_obj['geocodes'][0]
        lng = float(geocodes.get('location').split(',')[0])
        lat = float(geocodes.get('location').split(',')[1])
        return [lng, lat]
      else:
        return None
    else:
      return None
def gcj02_to_bd09(lng, lat):
  """
   Mars coordinate system (GCJ-02) Coordinates in 100 degrees (BD-09)
   Google, aude -- > baidu 
  :param lng: Mars coordinates longitude 
  :param lat: Latitude of Mars coordinates 
  :return:
  """
  z = math.sqrt(lng * lng + lat * lat) + 0.00002 * math.sin(lat * x_pi)
  theta = math.atan2(lat, lng) + 0.000003 * math.cos(lng * x_pi)
  bd_lng = z * math.cos(theta) + 0.0065
  bd_lat = z * math.sin(theta) + 0.006
  return [bd_lng, bd_lat]
def bd09_to_gcj02(bd_lon, bd_lat):
  """
   Baidu coordinate system (BD-09) Rotating Mars coordinate system (GCJ-02)
   Baidu, > Google, gaud 
  :param bd_lat: Latitude at baidu coordinates 
  :param bd_lon: Longitude of baidu coordinates 
  :return: Converted coordinate list form 
  """
  x = bd_lon - 0.0065
  y = bd_lat - 0.006
  z = math.sqrt(x * x + y * y) - 0.00002 * math.sin(y * x_pi)
  theta = math.atan2(y, x) - 0.000003 * math.cos(x * x_pi)
  gg_lng = z * math.cos(theta)
  gg_lat = z * math.sin(theta)
  return [gg_lng, gg_lat]
def wgs84_to_gcj02(lng, lat):
  """
  WGS84 turn GCJ02( Mars coordinate system )
  :param lng:WGS84 Longitude of the coordinate system 
  :param lat:WGS84 Latitude of coordinates 
  :return:
  """
  if out_of_china(lng, lat): #  Determine whether it is in the country 
    return lng, lat
  dlat = _transformlat(lng - 105.0, lat - 35.0)
  dlng = _transformlng(lng - 105.0, lat - 35.0)
  radlat = lat / 180.0 * pi
  magic = math.sin(radlat)
  magic = 1 - ee * magic * magic
  sqrtmagic = math.sqrt(magic)
  dlat = (dlat * 180.0) / ((a * (1 - ee)) / (magic * sqrtmagic) * pi)
  dlng = (dlng * 180.0) / (a / sqrtmagic * math.cos(radlat) * pi)
  mglat = lat + dlat
  mglng = lng + dlng
  return [mglng, mglat]
def gcj02_to_wgs84(lng, lat):
  """
  GCJ02( Mars coordinate system ) turn GPS84
  :param lng: The longitude of the Coordinates of Mars 
  :param lat: Latitude of Mars coordinate system 
  :return:
  """
  if out_of_china(lng, lat):
    return lng, lat
  dlat = _transformlat(lng - 105.0, lat - 35.0)
  dlng = _transformlng(lng - 105.0, lat - 35.0)
  radlat = lat / 180.0 * pi
  magic = math.sin(radlat)
  magic = 1 - ee * magic * magic
  sqrtmagic = math.sqrt(magic)
  dlat = (dlat * 180.0) / ((a * (1 - ee)) / (magic * sqrtmagic) * pi)
  dlng = (dlng * 180.0) / (a / sqrtmagic * math.cos(radlat) * pi)
  mglat = lat + dlat
  mglng = lng + dlng
  return [lng * 2 - mglng, lat * 2 - mglat]

def bd09_to_wgs84(bd_lon, bd_lat):
  lon, lat = bd09_to_gcj02(bd_lon, bd_lat)
  return gcj02_to_wgs84(lon, lat)

def wgs84_to_bd09(lon, lat):
  lon, lat = wgs84_to_gcj02(lon, lat)
  return gcj02_to_bd09(lon, lat)

def _transformlat(lng, lat):
  ret = -100.0 + 2.0 * lng + 3.0 * lat + 0.2 * lat * lat + \
     0.1 * lng * lat + 0.2 * math.sqrt(math.fabs(lng))
  ret += (20.0 * math.sin(6.0 * lng * pi) + 20.0 *
      math.sin(2.0 * lng * pi)) * 2.0 / 3.0
  ret += (20.0 * math.sin(lat * pi) + 40.0 *
      math.sin(lat / 3.0 * pi)) * 2.0 / 3.0
  ret += (160.0 * math.sin(lat / 12.0 * pi) + 320 *
      math.sin(lat * pi / 30.0)) * 2.0 / 3.0
  return ret

def _transformlng(lng, lat):
  ret = 300.0 + lng + 2.0 * lat + 0.1 * lng * lng + \
     0.1 * lng * lat + 0.1 * math.sqrt(math.fabs(lng))
  ret += (20.0 * math.sin(6.0 * lng * pi) + 20.0 *
      math.sin(2.0 * lng * pi)) * 2.0 / 3.0
  ret += (20.0 * math.sin(lng * pi) + 40.0 *
      math.sin(lng / 3.0 * pi)) * 2.0 / 3.0
  ret += (150.0 * math.sin(lng / 12.0 * pi) + 300.0 *
      math.sin(lng / 30.0 * pi)) * 2.0 / 3.0
  return ret

def out_of_china(lng, lat):
  """
   Judge whether it is in the country, do not do deviation in the country 
  :param lng:
  :param lat:
  :return:
  """
  return not (lng > 73.66 and lng < 135.05 and lat > 3.86 and lat < 53.55)

if __name__ == '__main__':
  lng = 118.7294833
  lat = 31.9341833
  result1 = gcj02_to_bd09(lng, lat)
  result2 = bd09_to_gcj02(lng, lat)
  result3 = wgs84_to_gcj02(lng, lat)
  result4 = gcj02_to_wgs84(lng, lat)
  result5 = bd09_to_wgs84(lng, lat)
  result6 = wgs84_to_bd09(lng, lat)
  s,v=wgs84_to_bd09(118.7294833,31.9341833)
  #lng1,lat1= wgs84_to_gcj02(lng,lat)
  #s,v =gcj02_to_bd09(lng1,lat1)
  print s,v
  #print result1, result2, result3, result4, result5, result6

conclusion